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The principal components analysis (PCA) modeling for spent mushroom substrate (SMS) and mycelia (Myc) identification of the wet and plastic covered materials. Two runs of Exp. 3 and 4 were applied to merge this multiple mosaic. a The pixel score plot. b The contour plot showing the result of class identification by selecting the pixel clusters within a. c The loading plot of the related components. d The mean spectra of the pixel clusters of SMS and Myc in a
